38220331 has 2 divisors, whose sum is σ = 38220332. Its totient is φ = 38220330.

The previous prime is 38220311. The next prime is 38220337. The reversal of 38220331 is 13302283.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13302283) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38220331 is a prime.

It is a super-2 number, since 2×38220331² = 2921587403499122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_2331670 and since 38220331 and 2331670 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (38220337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19110165 + 19110166.

It is an arithmetic number, because the mean of its divisors is an integer number (19110166).

Almost surely, 2^38220331 is an apocalyptic number.

38220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

38220331 is an equidigital number, since it uses as much as digits as its factorization.

38220331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 38220331 is about 6182.2593766357. The cubic root of 38220331 is about 336.8460672887.

The spelling of 38220331 in words is "thirty-eight million, two hundred twenty thousand, three hundred thirty-one".